Slip-resistent shoelace

ABSTRACT

A slip-resistant shoelace of the present invention includes a body having an external tube. The external tube is manufactured by weaving. Each of Pluralities of sections of a cavity of the external tube is filled with a center core respectively. The center cores are arranged at intervals to be discontinuous. Thus, sections having the center core are solid, and sections without the center core are hollow. The hollow sections can be used to be disposed in a shoelace hole stably or to be tied and knotted tightly. Thereby, the slip-resistant shoelace of the present invention can prevent the knot from slipping.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a shoelace, more especially to aslip-resistant shoelace.

2. Description of the Prior Art

A conventional shoelace after being knotted is easy to slip when beingtorn by external force. A slipped shoelace brings about danger.

Pluralities of slip-resistant shoelaces are disclosed in prior art. Atypical form is disclosed in the patents TW M479474, TW M240854, TW253245, and TW

M337982. A solid shoelace is arranged with thick sections and thinsections at intervals, wherein the thin sections can be replaced by flatsections. If the shoelace is tied and knotted at the thin sections, theshoelace is unable to slip due to blocking by the thick sections whenbeing torn by external force. A more specific form disclosed in TWM339939 and U.S. Pat. No. 5,946,779 defines that the thin sections havedensity larger than the thick sections.

However, the structures mentioned above have some problems. First, theshoelace has a ragged appearance due to the thick and the thin sectionsarranged at intervals. Moreover, to obtain the thick sections, materialneeded for weaving is more than normal uniform shoelaces. Besides, theshoelace with various diameters is difficult to manufacture, and it isalso time-consuming. Manufacture of shoelace with sections of differentdensity is even more difficult.

On the other hand, a structure with no difference in thickness inappearance is disclosed in U.S. Pat. No. 3,110,945. A hollow externaltube is filled with a continuous core, wherein pluralities ofprotrusions are disposed on the core. For example, the protrusions canbe formed by knotting of the core directly. This kind of shoelace canachieve the goal of slip-resist. However, the core is continuous. Inother words, the core exists at any position of the shoelace. Thus, theshoelace can be knotted tight enough. Also, the continuous arrangementincreases the quantity of material for weaving, and also fails toperformance of lightweight. Furthermore, the protrusions are formed bythe core knotting directly, so material is consumed more.

The present invention is, therefore, arisen to obviate or at leastmitigate the above mentioned disadvantages.

SUMMARY OF THE INVENTION

The main object of the present invention is to provide a slip-resistantshoelace to improve the problem of knot slipping. Also, theslip-resistant shoelace has a finer appearance.

To achieve the above and other objects, a slip-resistant shoelace of thepresent invention includes a body. The body includes an external tubewhich is woven. Each of pluralities of sections of cavity of theexternal tube is filled with a center core. The center cores arearranged at intervals. Sections without the center cores are hollow, andsections having the center cores are solid. The hollow sections of thebody are able to be disposed in a shoelace hole stably and to be tiedand knotted tightly. In addition, the external tube has a constant outerdiameter.

Thereby, the hollow sections of the body can be compressed flat whenbeing tied to prevent from slipping. Besides, due to the constantdiameter of the external tube, the body has no difference from normalshoelaces in appearance and is pleasing to the eye. Moreover, the centercores are arranged at intervals, so material and cost are economized incontrast with shoelaces with continuous center cores.

The present invention will become more obvious from the followingdescription when taken in connection with the accompanying drawings,which show, for purpose of illustrations only, the preferredembodiment(s) in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an illustration showing a slip-resistant shoelace of thepresent invention;

FIG. 2 is an axial cross-section view showing a slip-resistant shoelaceof the present invention;

FIG. 2 a is a radial cross-section view of FIG. 2 indicated as a-a;

FIG. 2 b is a radial cross-section view of FIG. 2 indicated as b-b;

FIG. 2 c is an axial cross-section view showing another embodiment of aslip-resistant shoelace of the present invention;

FIG. 3 is an illustration of using showing a slip-resistant shoelace ofthe present invention;

FIG. 3 a is a partial enlargement of FIG. 3.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIG. 1 and FIG. 2, the slip-resistant shoelace of thepresent invention includes a body 1. The body 1 includes an externaltube 11 which is woven toward a longitudinal direction of the externaltube 11. Each of pluralities of sections of the external tube 11 isfilled with a center core 12 which is woven toward a longitudinaldirection of the center core 12. Sections without the center core 12 arehollow, as shown in FIG. 2 b, and sections having center cores 12 aresolid, as shown in FIG. 2 a. The center cores 12 are arranged atintervals and are discontinuous. The center cores 12 and the externaltube 11 are woven respectively, wherein the center cores 12 are filledinto a cavity of the external tube 11 simultaneously when the externaltube 11 is being woven. The center cores 12 are positioned but not fixedby the external tube 11, so the center cores 12 are able to be separatedfrom the external tube 11. Besides, the external tube 11 has a constantouter diameter, so the body 1 has a smooth appearance, as shown in FIG.2 c. In another embodiment of the present invention, the external tube11 is slightly elastic because the external tube 11 is woven. Thus, theexternal tube 11 is expanded by the center cores 12 inside, so solidsections of the body 1 have slightly larger diameters than hollowsections, as shown in FIG. 2. The whole structure of the body 1 isthereby stabler. However, the difference of diameter is neglectable bynaked eyes, as shown in FIG. 1.

Please refer to FIG. 2, FIG. 3, and FIG. 3 a. In practical use, theslip-resistant shoelace of the present invention can be used on a shoe 2for knotting. The hollow sections of the body 1 can be arranged in ashoelace hole and the position of knotting. The hollow sections of thebody 1 become compressed flat due to pulling by the shoelace hole or theknot. When the body 1 is torn by external force, the solid sectionsprevent the body 1 from slipping. Furthermore, the body 1 has nodifference with a normal shoelace in appearance. Besides, due to thediscontinuous arrangement of the center cores, material and cost areeconomized comparing with continuous center cores of normal shoelaces.Also, the external tube has a uniform thickness and diameter. Comparingto conventional shoelaces in a ragged appearance, the shoelace of thepresent invention is easier to manufacture and is more economical. Inaddition, the discontinuous arrangement is lightweighting, and thecenter cores which are able to be removed are available for freearrangement.

What is claimed is:
 1. A slip-resistant shoelace, including a body, thebody including an external tube which is formed by weaving, a centercore being filled in a section of a cavity of the external tube, thesection of the body having the center core being solid, a section of thebody without the center core being hollow, the hollow section of thebody is able to be disposed in a shoelace hole stably and to be tied andknotted tightly.
 2. The slip-resistant shoelace of claim 1, wherein thebody has a plurality of center core, the center cores are arranged inthe cavity of the external tube at intervals.
 3. The slip-resistantshoelace of claim 1, wherein the center core and the external tube aremanufactured by weaving respectively, the center core is installed intothe cavity of the external tube simultaneously when the external tube isbeing manufactured by weaving.
 4. The slip-resistant shoelace of claim1, wherein the external tube has a constant outer diameter.
 5. Theslip-resistant shoelace of claim 1, wherein the center core ispositioned but not fixed by the external tube, the center core is ableto be separated from the external tube.